Valve-grinding machine



A ril 24, 19 a 1,667,602 E. 'P. ODONNELL VALVE GRINDING MACHINE v Filed Sept. 9. 1927 Sheets-Sheet 1 NNNNNN OR A ril 24, 192 6 1,667,602

E. P. ODONNELL VALVE GRINDING MACHINE File d sept. 9. 1927 :s Sheets-Sheet 2 EFQFWZIMZZ ATTORNEY WITNESS:

Fatentecl Apr. 24, 1928.

UNITED STA EDWARD rAUL oDoNnELL, or xmrimjoxnanoma.

VALVE-GRINDING MACHINE.

Application filed September 9, 1927.. Serial No. 218,567.

-1t is the purpose of'the present invention to provide a machine whereby all of the valves of an internal combustion engine can be ground simultaneously, thereby making it possible to perform this operation with considerable saving in both time and labor. V

One of the chief characteristics of the invention resides in theeprovision of means wherebv the valves are rotated approximately one-half a turn in one direction, and then rcversely rotated a quarter of a turn, with a view of more efficiently grinding the valves. with means for lifting the valves: off theirseats at predetermined intervals and subsequently reseating the valves in a different position.

Another object of the invention resides in providing a machine of the class in question, wherein the working parts are arranged within a suitable casing capable of being swung over the motor so that the valves can be ground from any angle. The nature and advantages of the invention will be betterunderstood when the following detailed description is'read in connection with the accompanying drawings, the in vention residing in the construction, combination and arrangement of parts as claimed. r

In thedrawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein v I Figure 1 is a view partly in section, showing a machine arranged upon the motor for use. r r p c Figure 2 is a fragmentary enlarged end elevation with: parts broken away.

Figure 3 is a sectionalview taken on the line 3-3 of Figure 1.

Figure 4 is a sectional view taken on the line 44 of Figure 1,

Figure 5 is anenlarged view of one of the tubular members, partly in section, and its.

associated parts.

Figure 6 is a detailed sectional View on line 6-6 of Figure 2.

Figure 7 is a similar sectional View on line 77 of Figure 1.

The machine forming the subject matter of the present invention essentially embodies a frame 10, the frame being of inverted U- shaped configuration and supporting spaced parallel shafts 11 and 12 respectively.

The. shaft 11 is mounted for rotation, while the held associated with the tubularniember by means of a fastening screw 18 whichis carried by thesolid bottom. 15, as shown.

Rising frointhe bottom 15 of eachtubular member is a rod 19, arranged centrally of the member and projecting an appreciable distance above the top thereof. This rod,

from a point adjacent the top of the tubular member to the end of the rod, is of rectangular contour in crosssection whichv is received in the squared bore on the stub shaft. or hub of a beveled "gear 20 in a manner which allows the rod sliding inovement with relation to the shaft 11, for a purpose to be 7 hereinafter described. The shaft 12 is provided with aseries of openings 21, through which the various rods 19 pass, and the gears 20 associatedwith these rods are arranged directly beneath'the shaft 11. Mounted on this,v shaft 11 isa pairof spaced beveled gears for each gear 20, and the'geais of each pair above mentioned are indicated at 23 and 24 respectively] These gears are com structed to alternately mesh with the gear 20 .for the purpose of rotating the rod 19 in opposite directions at relatively different distances for the efficient grinding of .the valves. In other words, the gear 2O is provided with teeth 25 which extend about the gear a distancesufiicient,torotate therod 19 a half revolution in one direction when this gear meshes 'withthe gear 20, and at which time the *gear 24 is out of mesh with the gear 20, because of the factthat theteeth 26 on .this gear only extend part way around the gear. Then again, the gears 23 and 24 are arranged-upon the shaft 11 with their teeth diametrically opposed, so that the gears 23 and 24 are alternately broughtinto meshingengagement with the gear20, which rotates the gear 20in opposite directions and consequently causes the rod 19 to turn in reverse directions; Whilethe teeth 25 of the gear 23 rotate therod 19 approximately one-v half of a turn, the teeth on the gear 24 are arranged to rotate the rod 19 in a reverse direction but onl aaaroximatel one-fourth of a turn in this direction. lVhile the shaft ll may be rotated in any suitable manner, I n'ef'erably make use of a small electric motor 27 mounted upon the frame 10, and including a sprocket 28 carried by the shaft of the motor. The shaft 11 extends an appreciable distance beyond one end of the frame and supports spaced sprocket Wheels 29 and 30 respectively. A sprocket chain 31 is trained over the sprocket 28 of the motor chain 35 by means of which the sha'tt 32 is rotated from the shaft 11. The cam 33 contacts a roll 36 carried by the shaft 12, and for each rotation of the shaft 32, the cam 33 COOPOi'tLtGS with the roll 36 tolift the shaft 12 in the slots formed in the end members of the frame 10. The rods 19 are provided with collars 37 arranged with relation to one sl'iaft 12, so that when the shaft 12 is lifted in the mamier just described, it contacts the collars 37 and thereby lifts the tulnilar members l-fl awayfrom the motor.

During this operation, the valves are simultaneously lifted from their seats, and slightly turned so that when the tubular members are lowered, the valves will. be re seated in a different position, a fact :oupled with the fact that the rods are rotated in reverse directions relatively different degrees, assures an etiicient grinding of the valves. For the purpose of lifting the valves otf the seats, l convert the tubular members l l into magnets which, of'comfse, attract'the valves and lift them away from their seats, incident to the movement of the tubular members away from the ,n'iotor. For this hurbosc, current is taken from the motor to a transforn'ier 38 and conveyed to a Winding 39 about each rod it). These windings 39 are Wholly arranged within the tubular members 14, andv connected with the solid bottoms 15 to magnetiae the latter for the purpose of lifting the valves in the man- .ner and for the purpose stated. lf desired,

the valve refaoing device 40 can be arranged upon the top of the frame.

This machine is mounted Within a casing l1 preferably supported by legs 42, the casing being constructed to be swung upon hinges or pivots 43, so that the machine can be dropped down over a motor, or swung from any angle into a position for use, especially when used With a motor of the V-type. It is manifest that I have devised a machine for the purpose intended whereby all of the valves of the motor can be quickly and ecrmomically ground, and the Work accomplished in comparatively quick order.

While it is believed that from the foregoing description, the nature and advantages of the invention Will be readily apparent, I desire to have it understood that I do not limit myself to What is herein shown and described, and that such changes may be resorted to when desired as fall Within the scope of what is claimed.

Having thus described the invention, I claim g i A means for grinding valves inan engine block, comprising a substantially U-shaped frame which is removablybolted on the block. valve engaging tools designed to each engage with a valve, a rod associated With each tool having an upper squared end, beveled gears having hub portions journaled on the frame having squared bores to receive the squared ends of the rods therein,

oppositely disposed n'uitilated gears engagmg each of the beveled gears, a shaft for the last mentioned gears, means for revolving the shaft whereby to cause the last mentioucd gears to in'upart reverse motion to the associated therewith, guide meaiis for the rods. conrprising a reciprocating member mounted on the frame, rollerson the ends of said member, cams on the stub shafts mounted adjacent to and engageable With the first mentioned rollers, means for revolving the cams to elevate the guide means,means supporting the rods on the guide means for thesame to be raised with the guide causing means and solenoidssurroundingeach rod and the tool. engagingielement thereon, and means ttor energizing the solenoids to attract the valves to raisethe same from their seats.

1n testin iony whereof'l affiX my signature.

nnvvi nn PAUL ODONNELL.

t mentioned gears and to the rods 

